Brittany Maynard, 29, a terminally ill woman who’s made headlines for her decision to end her life, may not do so on the scheduled date of Nov. 1, she said in a new video posted Wednesday. After her wedding last year, Maynard began having severe headaches, and in January was diagnosed with grade II astrocytoma. Doctors initially gave her 10 years to live, but subsequent scans showed the tumor progressed into glioblastoma multiforme, the deadliest form of cancer. In April she was given just 6 months to live. The family moved to Oregon where the state’s “Death with Dignity Act”…